Keep your cool under pressure with the Aqua Logic 1 Inch Flow Switch from Pet Store. This especially designed flow switch is applied to discontinue the power supply of your aquarium chiller when needed. This switch is vital in cutting off energy during pump failure, water changes or in events that the water flow suddenly stops. By simply using the Aqua Logic 1 Inch Flow Switch, the potential that the water inside the chiller freezes and bursts the chiller pipes is immediately avoided.